Q. What is the numerical value of the vector $3\widehat{i} + 4\widehat{j} + 5\widehat{k}?$
A) 3$\sqrt{2}$
B) 5$\sqrt{2}$
C) 7$\sqrt{2}$
D) 9$\sqrt{2}$
Explanation
(b) Required numerical value is $\sqrt{3^{2} + 4^{2} + 5^{2},\ }ie,\sqrt{50}$ or $5\sqrt{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.